Guang‐Can Guo

High-dimensional entanglement between distant atomic-ensemble memories

2016 · Light Science & Applications

Entangled quantum states in high-dimensional space show many advantages compared with entangled states in two-dimensional space. The former enable quantum communication with higher channel capacity, enable more efficient quantum-information processing and are more feasible for …

Experimental measurement-device-independent high dimensional entanglement quantification

2019 · arXiv (Cornell University)

The certification and quantification of entanglement are of great importance in characterizing entangled systems. Measurement-device-independent entanglement witness (MDIEW) has been developed to solve the problem of imperfection of measurement schemes and has been used to …

Experimental Detection of Entanglement Polytopes via Local Filters

2015 · arXiv (Cornell University)

Entanglement polytopes result in finitely many types of entanglement that can be detected by only measuring single-particle spectra. With high probability, however, the local spectra lie in more than one polytope, hence providing no information …

Multiplexed entangled photon-pair sources for all-fiber quantum networks

2016 · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

The ultimate goal of quantum information science is to build a global quantum network, which enables quantum resources to be distributed and shared between remote parties. Such a quantum network can be realized using only …

Finite-key analysis for round-robin-differential-phase-shift quantum key distribution

2020 · Optics Express

Since the round-robin-differential-phase-shift (RRDPS) quantum key distribution (QKD) protocol was proposed, it has attracted much attention due to its unique characteristic i.e., it can bind the amount of information leakage without monitoring signal disturbance. Recently, …

Experimental realization of high-fidelity teleportation via a non-Markovian open quantum system

2020 · Physical Review A

Open quantum systems and study of decoherence are important for our fundamental understanding of quantum physical phenomena. For practical purposes, a large number of quantum protocols exist that exploit quantum resources, e.g., entanglement, which allows …

Environment-induced sudden change of coherence in quantum systems

2020 · Physical Review A

Manipulating dynamical evolution is an important task in quantum information. The sudden death phenomenon (SDP), which is predicted to be unattainable beyond entanglement [T. Yu and J. H. Eberly, Sudden death of entanglement, Science 323, …

Simulating many-body physics with quantum nonlinear optics

2023 · Physical Review A

The rapidly growing field of quantum information can benefit greatly from quantum nonlinear optics, which has the potential to generate highly correlated optical states with a sufficiently large interaction strength per photon. Such states play …

Measurement-Device-Independent Quantum Key Distribution with Practical Spontaneous Parametric Down-Conversion Sources

2023 · Physical Review Applied

Measurement-device-independent (MDI) quantum key distribution (QKD) closes all the loopholes in the detection side, which greatly improves the practical security of QKD. Spontaneous parametric down-conversion (SPDC) sources play a significant role in MDI QKD by …

Entanglement Networks with Fiber-Pigtailed Silicon Nitride Microring

2023

A fully connected entanglement network with four users is experimentally demonstrated by using multi-wavelength energy-time entanglement source with a fiber-pigtailed silicon nitride microring. The entanglement-based quantum key distributions among users are realized with improved performance.

Certification of genuinely entangled subspaces of the five qubit code via robust self-testing

2025 · Reports on Progress in Physics

Self-testing provides a device-independent framework for certifying quantum properties based solely on input-output statistics while treating quantum devices as black boxes. It has evolved significantly from its origins in bipartite systems to applications in multipartite …